CentOS (short for Community Enterprise Operating System) is a community driven, free and open-source distribution that is functionally compatible with Red Hat Enterprise Linux (RHEL). The CentOS distribution was discontinued in December 2021, however it has now been succeeded by [Rocky Linux](https://rockylinux.org/) and [AlmaLinux](https://almalinux.org/)
Debian is a free and open-source Linux distribution developed by the Debian Project, an all volunteer software community organization. Debian is the upstream distribution of Ubuntu.
Ubuntu is a free and open-source Linux distribution based on Debian. Ubuntu is available in three versions Desktop, Server and Core.
Red Hat Enterprise Linux (RHEL) is a commercial open-source Linxus distribution based on Fedora, that is sold as a commercial enterprise operating system.
Red Hat Enterprise Linux (RHEL) is a popular distribution of the Linux operating system that is designed for enterprise-level use. It is developed and maintained by Red Hat, Inc., and it is available under a subscription-based model.
There are several distributions of Linux that are based on RHEL, or that have been derived from RHEL in some way. These distributions are known as RHEL derivatives. Some examples of RHEL derivatives include: AlmaLinux, CentOS, CloudLinux, Oracle Linux, and Scientific Linux.
RHEL derivatives are often used in enterprise environments because they offer the stability and reliability of RHEL, but with the added benefit of being free or lower-cost alternatives.
<BadgeLinkbadgeText='Official Website'colorScheme='blue'href='https://www.redhat.com/en/technologies/linux-platforms/enterprise-linux'>Red Hat Enterprise Linux Website</BadgeLink>
<BadgeLinkbadgeText='Read'colorScheme='yellow'href='https://www.redhat.com/en/technologies/linux-platforms/enterprise-linux/get-started'>RHEL Getting Started Guides</BadgeLink>
<BadgeLinkcolorScheme='yellow'badgeText='Read'href='https://www.redhat.com/en/topics/linux/what-is-rhel'>What is Red Hat Enterprise Linux (RHEL) - Red Hat</BadgeLink>
Fedora Linux is a free and open-source Linux distribution developed by the [Fedora Project](https://fedoraproject.org/), an open source focussed community. Fedora Linux releases new versions every six months and is the upstream source for Red Hat Enterprise Linux (RHEL)
<BadgeLinkbadgeText='Official Website'colorScheme='blue'href='https://fedoraproject.org/'>Fedora Linux Website</BadgeLink>
<BadgeLinkbadgeText='Read'colorScheme='yellow'href='https://docs.fedoraproject.org/en-US/quick-docs/getting-started-guide/'>Fedora Linux Getting Started Guide</BadgeLink>
Debian is a free and open-source Linux distribution developed by the Debian Project, an all volunteer software community organization. Debian is the upstream distribution of Ubuntu.
It's a packet sniffer used for packet captures such as WEP IVs (Initialization Vector) and WAP Handshake. Even if you have a GPS receiver connected to the computer, you can log the coordinates of the found access points.
<BadgeLinkbadgeText='Watch'colorScheme='red'href='https://www.youtube.com/watch?v=ftM-Fra90VM'> Airodump ng Tool and Capture WPA WPA2 Handshake</BadgeLink>
<BadgeLinkbadgeText='Watch'colorScheme="red"href='https://www.youtube.com/watch?v=O6jYy421tGw'> Airodump ng Tool and Capture WPA WPA2 Handshake (by MBP Security on YouTube)</BadgeLink>
`egrep` (**E**xtended **Grep**) is a pattern searching command which belongs to the family of grep functions. It treats the pattern as an extended **regular expression** and prints out the lines that match the pattern.
It works the same way as `$ grep -E` command
It has the following syntax:
`$ egrep [options] pattern [files]` e.g. `$ egrep "search-regex" *.txt`
`fgrep` (**F**ixed **Grep**) command is used for searching fixed-character strings in a file.
It treats meta-characters or regular expressions in the search field as strings. For searching any **direct string** or files having meta-characters, this is the version of grep which should be selected. It works the same way as `$ grep -F` command.
It has the following syntax:
`$ fgrep [options] [string] [files]` e.g. `$ fgrep "search-string" file.txt`
<BadgeLinkcolorScheme='yellow'badgeText='Read'href='https://www.geeksforgeeks.org/fgrep-command-in-linux-with-examples/'>Fgrep command with examples</BadgeLink>
<BadgeLinkcolorScheme='yellow'badgeText='Read'href='https://www.tecmint.com/difference-between-grep-egrep-and-fgrep-in-linux/'>Grep vs Egrep vs Fgrep</BadgeLink>
The Caddy web server is an extensible, cross-platform, open-source web server written in Go. It has some really nice features like automatic SSL/HTTPs and a really easy configuration file.
<BadgeLinkbadgeText='Getting Started'colorScheme='blue'href='https://confluence.atlassian.com/bamboo/getting-started-with-bamboo-289277283.html'>Bamboo Getting Started Guide</BadgeLink>
Kamran Ahmed
2 years ago